Method and device for recognizing image

Abstract

An image recognition method and device are disclosed. The disclosed device may include: a reference image storage unit configured to convert reference images into 1-dimensional vectors and store the converted 1-dimensional vectors; an image acquisition unit configured to obtain an input image; an image converter unit configured to convert the input image into a 1-dimensional vector, apply dimension reduction, and calculate coefficients for expressing the input image as a linear sum of vectors forming a reference image for each of the reference images; and a determiner unit configured to determine a reference image corresponding to the input image by performing a subtraction computation of subtracting a value obtained by applying the coefficients calculated for each reference image to a relevant reference image from the converted input image. The invention makes it possible to perform image recognition at a fast speed and lower the likelihood of the users' privacy being invaded.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of Korean Patent Application No. 10-2014-0152375, filed with the Korean Intellectual Property Office on Nov. 4, 2014, the disclosure of which is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Technical Field[0003]The present invention relates to a method and a device for recognizing images.[0004]2. Description of the Related Art[0005]Together with advances in electronic equipment and communication technology, there are rapid changes also in the field of authentication for permitting entry or use. The authentication of a user is performed by a variety of methods for providing authorization to enter a particular area, use a particular device, and the like.[0006]One of the most representative authentication methods involves checking whether or not a certain body part of a person matches a pre-stored reference image.[0007]For example, a commonly used method is to photog...

AI Technical Summary

Benefits of technology

The patent describes an image recognition device and method that can quickly recognize images. Additionally, the device stores reference images in a converted form to protect users' privacy. Overall, this technology allows for faster image recognition while maintaining privacy for users.

Problems solved by technology

This type of authentication method requires obtaining and comparing images, and as this requires a considerable amount of computation, an expensive processor as well as a relatively long processing time may be needed.

Also, since the image obtained from the camera is not always obtained from the same angle as that of the reference image, there may also be problems in the stability of the processing.

Furthermore, storing the images of users' body parts in the system may pose a problem in terms of protecting privacy.

Images